Hmm, solved this while I was typing up the message :] I\'m running BOINC on Suse SLES9 on a 2-Xeon machine with Hyperthreading, and after a while it started using just two of the four reported CPUs. Turns out in my general preferences max # of CPUs was set to two, although I don\'t remember ever changing that. Fixed the preferences, restarted BOINC with -update_prefs http://climateprediction.net/ and got it working again...

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Good one, Alex; we can use all the help people are willing to give.

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"We have met the enemy and he is us." -- Pogo
Greetings from coastal Washington state, the scenic US Pacific Northwest.